US3043708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified carbon black
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1959-07-13
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Granted: 1962-07-10
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Expires: 1979-07-13
Abstract
No abstract record available.
Inventors
- 👤 Watson John William
- 👤 Kendall Charles Edwin
- 👤 Jervis Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:34
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C08; C08K; C08K9/00; C08K9/04; C01; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
52 words
A MODIFIED CARBON BLACK FOR EFFECTING IMPROVEMENT IN NATURAL AND SYNTHETIC RUBBERS AND THE LIKE, AND HAVING AT LEAST A PORTION OF THE REACTIVE SITES ON THE SURFACE OF CARBON BLACK PARTICLES CHEMICALLY ATTACHED THROUGH CARBON-TO-CARBON BONDS WITH HYDROCARBON GROUPS FORMING ADDITIONS TO THE CARBON BLACK AND PROVIDING INCREASED HYDROGEN CONTENT THEREOF.
Claim 2
Dependent Claim
52 words
A MODIFIED CARBON BLACK FOR EFFECTING IMPROVEMENT IN NATURAL AND SYNTHETIC RUBBERS AND THE LIKE, AND HAVING AT LEAST A PORTION OF THE REACTIVE SITES ON THE SURFACE OF CARBON BLACK PARTICLES CHEMICALLY ATTACHED THROUGH CARBON-TO-CARBON BONDS WITH HYDROCARBON GROUPS FORMING ADDITIONS TO THE CARBON BLACK AND PROVIDING INCREASED HYDROGEN CONTENT THEREOF.
Claim 3
Dependent Claim
27 words
A PROCESS FOR THE PRODUCTION OF MODIFIED CARBON BLACK WHICH COMPRISES MIXING CARBON BLACK WITH A FRIEDEL-CRAFTS ALKYLATING AGENT IN THE PRESENCE OF A FRIEDEL-CRAFTS REACTION CATALYST.
Claim 4
Dependent Claim
27 words
A PROCESS FOR THE PRODUCTION OF MODIFIED CARBON BLACK WHICH COMPRISES MIXING CARBON BLACK WITH A FRIEDEL-CRAFTS ALKYLATING AGENT IN THE PRESENCE OF A FRIEDEL-CRAFTS REACTION CATALYST.
References Cited (Backward Citations)
BE515286A
Cited
US2408696A
Cited
US2780612A
Cited
US2816046A
Cited
US2893887A
Cited
US2867540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |